04385636 is referenced by 90 patents and cites 8 patents.

An improvement in design of an implantable telemetric differential pressure sensing device enabling thinner, more compact, and simplified construction for the device; increased pressure sensitivity and range of measurement; and a wider class of applications for such pressure sensing devices in diagnostic medicine and clinical monitoring. The implanted device includes a thin, planar, closed, conductive loop which moves with a flexible diaphragm, the diaphragm moving upon changes in the difference of two bodily pressures on its opposite sides. The position of the conductive loop relative to a resonant circuit fixed in the device determines the resonant frequency of the resonant circuit. The resonant frequency is detected telemetrically outside the body, and its value is used to determine the difference in the two bodily pressures.

Title
Telemetric differential pressure sensor with the improvement of a conductive shorted loop tuning element and a resonant circuit
Application Number
697948
Publication Number
4385636
Application Date
February 5, 1981
Publication Date
May 31, 1983
Inventor
Eric R Cosman
872 Concord Ave., Belmont, 02178
MA, US
Agent
Richard J Birch
IPC
A61B 5/10
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